Watkin, who was involved in Warren Gatland’s national set-up in the autumn, was taken from the Liberty Stadium on a stretcher late on.
Chris Towers, Ospreys’ medical performance manager, has confirmed Watkin was released from hospital on Saturday evening with “no structural damage”.
The young centre suffered an impact to the neck and was taken to hospital as a precautionary measure.
Towers confirmed on Sunday that having been thoroughly checked out, Watkin went home late on Saturday evening and will report to Llandarcy Academy of Sport on Monday to be further assessed by the medical team before any necessary treatment plan can be put in place ahead of his return to play.
Watkin has had long spells on the sidelines with knee and concussion trouble, but remains one of the brightest young talents in the game.
At this stage it remains unclear whether he will be able to feature in the Ospreys’ crucial European Rugby Champions Cup encounter with double defending champions Saracens this Saturday evening.
